Drier for various forms of material



1m11.192s. 1,521,886 A, HUHN y DMER FOR VARIOUS vFQMs'oF MATERIAL v'original Filed July 16, 1919v e Sheets-sheet '1 rl'sv fforneys.

Jan, 6, l 925.

A. HUHN DRIER FOR VARIOUS l FORMS OF'MATERIAL original *Filed 'JulyA 16v 1919 l `a sheets-sheet g es/E 20 Jan, 6, 1925.I

vA. HVUHN -DHIER yFIOR VARIOUS v FORMSy OF MATERIAL Original Filed July 1 6,` 1919 6 Sheets-Sheet 5'@ Jan, 6, 1925.

A. HUHN DRIER FOR VARIOUS FORMS OF MATERIAL Original Filed July 16, 1919 6 Sheets-Sheet 6 7771/6 77 far.' nor Hair?. @www his Fffarneys.

rPatented Jan. 6, 1925.

UNITED STATES PATENT OFFICE- ANTON HUHN, OF MINNEAPOLIS, MINNESOTA, AssIsNoR` To A. HUHN MANUFAC- TUBING COMIANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

DRIERFOR vARIocs FORMS or MA'ALERIAL.`

Application ledJuly 16, 1919.5eria1 No. 311.201.' Renewed June 9, 1924.

To rl-ZZ whom v'zvmay concern.:

Be itknown that I, 'ANTON HUHN, la citizen of the United States, residing at Minneapolis, in the county of'Hennepin and State of 'Minnesotzu have invented certain new and useful Improvements in Driers for Various Forms of Material, of which the yfollowing is a` specification.

My inventio-n relates to driers for various forms of material and particularly material which might have a tendency -to cling to heatedsurfaces and r.become scorched or damaged thereby. An object of my invention is to construct a drier which shall use in the largest measure the heat units applied to the drier withoutinjury to the product and which shall effect drying of the product with great discharge and high efliciency. Among the special objects of my invention are the provision of an eilieient arrangement of heating pipes and. supporting means therefor, the provision of convenient means for supporting the frame of the ldrier and the provision of means for feeding the material t-o and through the drier in a uniform stream. f

The full objects of my invention will appear in connection with the detailed description thereof and the novel fea-tures embodied in my inventive idea will be particularly pointed out in the claims. f f

In the drawings, illustrating the application of my invention in one form- F ig. 1 is a central longitudinal section of my drier. Fig. 2 is a section on the lline 2-2 of Fig. ly drawn upon an enlarged' scale Fig. 3 is a section on the line 3 3 of Fig. 1 drawn upon an enlarged scale. Fig. 4 is a section on the line 4 4 of Fig. 1 drawn upon an. enlarged scale'. Fig. 5 is a detail view mostlyv in side elevation of a pipe-supporting device. Fig. 6 is a section on the line 6-6 of Fig. 5. Fig. 7 is an enlarged sectional detail View of acylindersupporting device. Fig. 8 is a side elevational sectional view of the portion of the .drier'vfor feeding in material. Fig. 9 is a View in section on the line 9-9 of Fig. v8. Fig. 10 is a general view in side elevation showing the arrangement for operating different parts of the machine from the same source of power.

The device embodies a frame consisting of a front annular casting 10 and a rear annular casting 11 secured together by "longitudinal members 12, 13, 14- andl, precurved recesses for receiving cylindrical rods -or bearingsr 23 having headed ends so'that the flanges rest upon these cylindrical bearings instead of resting directly upon the blocks.A 0n account of this varrangement the frame may be readily mounted in proper position upon the I-beams andqis vthen se- `cured thereto byv bolts 24 passing through the flanges and the horizontal portions of the I-beams. -The rear blocks 2() are thicker than the front blocks y19 to cause the machine yto slope downwardly from rear to front and,

obviously, the slope can be varied by changing the thickness of the blocks at one end.

The use of the bearings 23 allowsthe slope oflthe frameto be readily changed, since the frame may rock upon the bearings. An outerl cylinder -25 is rotatably supported upon rollers 26 at its front and `rollers 27 at its rear, these rollers being journaled upon the frame. A pinion 2S meshes with an annular spurgear 29 secured around the front end of said cylinder. secured to a shaft 30 to which is also secured a pulley 31 adapted to be driven byl a belt 32 from any suitable source of power. Y The in terior wall of the cylinderv25 has secured thereto a plurality of flights 33,- while va smaller cylinder 34 is concentrically secured to the outer cylinder and Within the same by brace rods 35. The exterior of thev cylinder 34 is provided with va plurality'of flights 36 which cooperate with the flights l33 to lift the material which is being dried The pinion is by a plate 38, as shown in Fig 2." The outer cylinder has its frontend rotatablepwithin an annular flange 39k secured to the' front casting, and this cylinder has its rear end rotatable 'within an .annular flange 40 secured,l

.is admitted to the compartment 41 through a pipe 49 leading from' a suitable retort or heating device not shown- 'A multiplicity ofpipes located within the smaller cylinder 34 when this inner cylinder is employed lead fromthe variouscompart-ments to the rear of the machine, where they are bent upon a curve and extended back to the front portion to other compartments as follows.- Four pipes leading from the compartment 41 are curved at the rear of the machine vso as to extend forwardly and dischargeinto the compartment 42. "F our pipes 51 leading from the .compartment 42 are curved at the rear so as to extend forwardly and discharge into the compartmeni, 43. Four pipes 52 leading from the compartment 43 are curved at the rear so as to extend forwardly and discharge into the compartment 44. Four pipes 53 leading from the compartment 44 are curved at-the rear so as to extend forwardly and discharge into the compartment 45. Four pipes 54 leading from the compartment 45 are curved at the rea-.r so as to extend forwardly and discharge into the compartment 46. Four pipes leading from the compartment 46 are curved at the rear so as to extend forwardly and'discharge into the compartment 47. Four pipes 56 leading from the compartment47 are curved `at the rear so as to extendk forwardly and dischargeinto the compartment 48. From the compartment 48 a return pipe 57 leads back to the retort or other device for heat ing the oil. In Fig. 4 in order to avoid confusion the manner in which each group of pipes leads from one compartment and back to another is indicated for only one of the pipes by dotted lines. All of the pipes 5() to 56 have their front open ends supported bythe inner wall of the hollow casting 9. The four pipes 50 are supported at their rear curved portions as follows: An angle bar` 58 is bolted to a casting 59 which in turnisvbolted to the annular casting 11 so as toI lie within'the inner circle thereof. Saddle members 60 and 61 which may be cast are hollowed out at spaced intervals so as to partly embrace the pipes 50 on opposite sides thereof, and these members are held together upon the pipes and are attached to the angle bar 58 by bolts vwhich have a reduced portion 62 passing through the saddle members. Nuts 63 onfthe bo-lts hold the saddle members 61 against the shoulders of enlarged portions 64 of the bolts. At the ends of the enlarged portions are nuts 65, and these enlarged portions are sufficiently long so that they may slide in the angle bar to compensate for expansion and contraction. In order to obtain greater strength a. steel plate 68 may be placed on the outer side of the saddle member 60 for engagement the nuts 63. The pipes 50 have secured thereon collars 66 which rest upon 'the saddles, the latter being provided. with inclined bosses 67 for this purpose, since the curved portions of the pipes lie slightlyout of a vertical plane, due 'to the fact that the inlet ends of the pipes are notv directly above the outlet ends, as will be apparent from Fig.v 4. The pipes 51 to 56 are-supported by plates 69 through which they pass, these plates in turn being supported by thevpipes 50 which pass therethrough. Airis drawn into the drier through an opening 7 0 at therear and vpasses over the pipes 50 to 56, being deflected alternately upwardly and downwardly by the plates 69 which are arranged in staggered relation. The heated air passes out of the forward end of the inner cylinder and into the annular space between the cylinders so that it passes back through the material which is being repeatedly lifted by the flights. Thecurrent of air through the apparatus is produced by a fan connected with a casing 71. The manner in which the rear end of the inner cylinder 34 is rotatably supported is best shown in Fig. 7. The casting 59 has bolted to'it an annular flange 72, the oppositefaces of which are engaged by a recessed flange member 73 bolted to the end of the rotatablecylinder so that a tight join-t is produced. The mechanism for feeding material intothe annular drying chamber is shown particularly in Figs. 8 and 9. The material passes down a chute 74 provided'with an observation slide75 and is delivered i'n controllable quantity to a casing 76, the lower portion of which contains vthe screw-conveyor 37 previously referred to leading to the annular drying chamber In order that .the screw-conveyor may deliver a'uniform stream which may beregulated as desired, the casing 76 is provided with a feed wheel 77 having a series ofblades 78,

to indica-te the amount of opening thereof.

Pulleys 92 and 93 secured respectively to the shafts of the feed wheel and the screwconveyor serve` to drive thesame, and these pulleys may-be driven from the same source of power that drives thecylinders'of the uniformflow of material through the drier and out o f the discharge chute 94 located y at the frontA thereof.

The advantages of my improved drier will be readily understood from the detailed description-thereof. -Any degree of heat whichis desired may-be obtained and yet the material operated upon will not be scorched or impaired or even discolored. W'hen an inner cylinder is used the heating pipes are ylocated entirely. within the' same. and the direct radiation vof heat fromthe pipes is transmitted to the walls' of said 1inner cylinder, which in turny transmit the heat to the annular chamber which constitutes the drying area. For this reasonthere is no loss of heat and the 'air admitted through the inlet opening becomes -rapidly and uniformly heated. This air passes first through-,the discharge stream of material within the heated chamber leading to the discharge chute or passageway 94. The air atl that time is the hottest and driest and therefore removes from the' discharging material the last desired amounts of moisture. This air is constrained to pass through the annular drying chamber in a uniform heated stream and is at all times in contact with the double streams of falling material, that is the material falling from the ights in the outer drum upon the inner drum at the upper part of the annular drying chamber, and material falling from the iiights on the inner drum t0 the outer drum in the lower portion ofthe annular drying chamber. There will also be more or less falling of material at the sides, so that substantially the entire annular chamber will be filled with falling material subjected to the draft of heated air. 'It thus follows that for the actual space within the drum a maximum amount of drying is effected. By the use of my circulating system in which heated oil is -used the air to which the material to be treated is subjected may be highl heated and the temperature thereof may e raised as high as six hundred degrees Fahrenheit. As shown in Fig. 10, a shaft 95 journaled in hangers 96 and 97 is provided -at its front end with a clutch pulley 98 driven by a belt 99 from any suitable source of power. The pulley 98 may be clutched and unclutched with relation to the shaft 95 by a hand lever 100. A pulley 101 secured to the shaft 95 is connected to the pulley 31 by the belt v232 whereby the lcylinder or drum 33 is rotated. Secured to the shaft toward its other end is a pulley 102 which is connected to the pulley 93 of.

the screw-conveyor by a belt 103, the size of the pulleys preferably being such that the `screw-conveyor isdriven at thefsame rate Aof speed as the cylinder 33.` Securedto the shaft95 near the pulley 102'is a pulley 104 which is connected by a'belt 105 to the 'pulley 92 offthe feed wheel, .the relative .size of the latter pulleysbeing such that the -feed wheel isydriven at a .reduced rate of speed and slower than 'the screw-conveyor. lt will be readilyunderstood that Iby operating the hand vlever 100, that the cylinder, .the screw-conveyor andthe feed wheeljwill all stop and ,starty in unison, thereby prevent- `ing clogging of I claim: x

the material in the machine.`

1. v.A drier comprising; a rotatable drum, means for feeding material ltobe treated into said. drum, a plurality of pipes .associated with said drum for heating air by oil to-sub- 'stantially 600 F., and mean'sjfor causing said-heated air to-passfthrough said drum. 2..A drier comprisingv a rotatable. member, means forlcausing heated vair to pass through said member, a screw-conveyor for feeding material Ato; be vtreated into said member, and a feed wheel for supplyinga uniform stream' of saidmaterial to said screw-conveyor. l

3. A drier comprising a rotatable member, means for causing heated air to` pass through said member, a screw-conveyor for feeding material to be treated into said member, a: feed wheel for supplyin a unform stream of said material to 'sai screwconveyor, and means for re ulating the quantity. of material supplied y said feed wheel. p v 4. A drier comprising a rotatable member, means for causing heated air to pass through said member, a screw-conveyor for feeding material to be treated into said member, a feed wheel having blades for supplying a uniform stream of said material to said screw-conveyor, andan adjustable slide adapted tov be moved toward and' away yfrom the downwardly-moving sideof said feed wheel. n

5. A drier comprising a rotatable member,l means for causing heated air to pass` through said member, a screw-conveyor for feeding material to be treated A,into said member, a feed wheel for supplying a uniform stream of said material to said screwconveyor, and means for driving said rotatable member, said feed wheel and said screw-conveyor from a common source of power.

6. A drier comprising a rotatable drum,

means for feeding material to be treated into said drum.

f 7. A drier comprising a frame, adr-um rotatably mounted in said trame, a hollow member attached to saidt'rame at one end 'of said drum, a plurality of compartments in said hollow member, an inlet pipe for a heating medium leading to the first of said compartments, a return pipe-` for said heating medium leading from the last of said compartments, a plurality of pipes connecting said compartments in series, said pipes extending-Jtfrom said hollow member to the. other end olf said drum and returning to said hollow drum, and means for feeding Imaterial to be. treatedinto said drum.

8. A drier comprising a frame, a drum rotatably mounted in said frame, a hollow member attached to'sa'id frame at one end ot said drum, a plurality of compartments in said hollow member, a plurality of sets of pipes connecting said compartments in series, said pipes extending from saidhollow member to the other end of said drum rand returning to said hollow drum, means for supporting one of said sets of pipes from the frame at the end opposite said hollow member, means for `supporting the other sets of pipes fromsa-id Erst-mentioned set lof pipes. means for causing a heating medium to circulate through all of said pipes, and means for feeding material to be treated intosad drum.

i). A drier comprising a frame., blocks tor supporting the ends of said frame, cylindrical .bearings interposed between said frame and said blocks.a drum rotatably mounted in said frame, and means for feeding material to be ytreated into the said drum;

- 10. A drier comprising a frame, flanges onthe bottom of7 said frame at the ends thereof, blocksl for supportingthe ends of said frame, transverse grooves in the adjacent faces of said flanges and blocks, cylindrical bearings in said grooves whereby said frame is pivotally mounted', a drum rotatably mounted in said frame, and means for feeding material to be treated into said drum.

In testimony whereof I hereunto affix my signature.

ANTON HUHN. 

